如何在java中更改鼠标光标？

Question

I have a list of words inside the JList. Every time I point the mouse cursor at a word, I want the cursor to change into a hand cursor. Now my problem is how to do that?

Could someone help me with this problem?

Answer 1

Use a MouseMotionListener on your JList to detect when the mouse enters it and then call setCursor to convert it into a HAND_CURSOR .

Sample code:

final JList list = new JList(new String[] {"a","b","c"});
list.addMouseMotionListener(new MouseMotionListener() {
    @Override
    public void mouseMoved(MouseEvent e) {
        final int x = e.getX();
        final int y = e.getY();
        // only display a hand if the cursor is over the items
        final Rectangle cellBounds = list.getCellBounds(0, list.getModel().getSize() - 1);
        if (cellBounds != null && cellBounds.contains(x, y)) {
            list.setCursor(new Cursor(Cursor.HAND_CURSOR));
        } else {
            list.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
        }
    }

    @Override
    public void mouseDragged(MouseEvent e) {
    }
});

Answer 2

您可能希望查看Component.setCursor方法，并将其与Cursor.HAND常量一起使用。

Answer 3

You can also add MouseListener to the jList (or any ui component). Then implement the methods that mouseEntered , mouseExited

jList.addMouseListener(new MouseListener() {
                    @Override
                    public void mouseEntered(MouseEvent e) {
                        cw.list.setCursor(new Cursor(Cursor.CROSSHAIR_CURSOR));
                    }

                    @Override
                    public void mouseExited(MouseEvent e) {
                        cw.list.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
                    }
                });